Please visit Persons and click on Add a new person to invite a team member. If the person is already in the system, you can use the Edit option to resend the invite. Alternately, you can visit Settings > Integrations to invite your team in bulk.
Each person gets an email invite and upon accepting the invite they can either create an AssessTEAM account or simply login with one of our integrated services like Google Workspace, Microsoft 365, Basecamp, and others.